dīng zhōng
意思解释：（Ding Zhong）古代课税，征徭役，以年龄分为黄、小、中、丁、老五类。丁中为其中主要两类。此制始于北齐。历代迭有变更。
指户役之年龄，始于北齐，历代迭有变更。《隋书·食货志》:“至河清(北齐武成帝年号)三年定令……男子十八以上六十五以下为丁，十六以上十七以下为中，六十六以上为老，十五以下为小，率以十八受田输租调，二十充兵，六十免力役，六十…
Point to the age of a battle, only then at the Northern Qi Dynasty, past dynasties alternate has change. does · of book of the Sui Dynasty feed goods keep in mind : Wu Chengdi the title of an emperor's reign of the Northern Qi Dynasty of of care of father a surname) make 3 years surely... 18 above of man 65 it is man below, 16 above seventeen in be below, 66 above are old, 15 it is below small, rate with 18 suffer cropland to be defeated hire shift, 20 fill arms, the 60 battle that avoid strength, 60...
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